CKPBLOK CKPBLOK provides checkpoint information needed for VM/370 warm start recovery for 3704/3705 Communication Controllers and enabled lines and resources. Tbe RDEVCKPT field
of the RDEVBLOK points to CKPBLOK. Hexadecimal
o
a 10 Displacellent
------------ 0 2
4
8 10 I CKPSIZE CKPRMAX 1//////////CKPRSV1//////////1 --------------------------------------------------------1 CKPNAME 1 ------------------------------------------------------1
Field
Nalle CKPSIZE DS CKPRMAX DS CKPRSV1 DS CKPNAME DS CKPBITS DS CKPBKSZ EQU 1H 18 1F
CLa OD CKPBITS I Field Description, Contents, Meaning Size of checkpoint block in dcublewords
Number of resources checkpcinted
Reserved for IBM use 370x control program reference nalle Bit map of enabled lines or rescurces (CKPBITS-CKPBLOK)/a Header size in doublewcrds
14 IBM VM/370 Data Areas and Control Block Logic

CONTASK CONTASK contains data and control information pertinent to the control and communication between virtual and real terminal console tasks and command streams. The RDEVCON field
of the RDEVBLOK and the NICQPNT field of the NICELOK point to CONTASK. 0 CONPNT CONRE'lN
8 C*1 I C*2 10 18 20 28 30 Hexadecimal Field
Displacement Name
o
4
8
9
A
C 10 10 14
15
16 10 18 20 28 30 CONPNT DS CONRETN DS CONSTAT DS liit§ CONOUTPT EQU CONRESP EQO CONACTV EQO CONCNTL EQO CONESCP EQO CONRTRY BQU CONSPLT EQO CON SYNC EQO CONPARM DS CONTSKSZ DS CONOSER DS CONCCi1 DS ORG CONADDR DS CONFLAG DS CONDiC DS CONCNT DS ORG CONCOMND DS CONCCi2 DS CONCCi3 DS CONCCW4 DS CONDATA DS CONTSIZE EQU I CONTSKSZ CONUSER CONCCW1 CONCCW2 CONCCW3 CONCCW4 CONDATA (Variable Length)
1F
1F 1X in CONSTAT -X'80'-- X'40' X'20' X'10' X'08' X'02' X'01' 11 1H
1F
1D CONCCi1 1F 1X 1X 1H CONADDR 1X 1D
1D
1D OC Field Description, Contents, Meaning Pointer to next CONTASK Pointer to SAVEAREA for return
C*1 CONTASK status control flags
Generate CONTASK output
Respcnse expected from this CCNTASK CONTASK is active on real device
This is a centrol CONTASK cnly CONTASK contains device deFendent data Retry operation in progress Output data being split via RDEVLLEN CONTASK for synchronization enly
C*2 DMKQCN parameter flags (see "APFendix A. CP and RSCS Equate Symbels") CONTASK size in doublewords
Address of VMBLOK for destination user
First console I/O CCll CCi data address CCi flag bits DIAGNOSE write control CCll t:yte count CCi command code
Second console I/O CCll Third console I/O CCli Fourth console i/O CCll Output data area (variable length) (*-CONTASK)/8 CONTASK size in doublewords
Section 1. CP Data Areas and Centrol Blocks 15